分享一个WordPress面包屑导航代码

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转载分享一段WordPress面包屑导航代码，支持自定义帖子类型、自定义分类，但貌似在分类归档页面不能显示父子分类层级有点遗憾。

将代码添加到当前主题函数模板functions.php中：

/**
 * WordPress Breadcrumbs
 */
function tsh_wp_custom_breadcrumbs() {
 
    $separator              = '/';
    $breadcrumbs_id         = 'tsh_breadcrumbs';
    $breadcrumbs_class      = 'tsh_breadcrumbs';
    $home_title             = esc_html__('Home', 'your-domain');
 
    // Add here you custom post taxonomies
    $tsh_custom_taxonomy    = 'product_cat';
 
    global $post,$wp_query;
       
    // Hide from front page
    if ( !is_front_page() ) {
       
        echo '
';
           
        // Home
        echo '
' . $home_title . '
';
        echo '
 ' . $separator . ' 
';
           
        if ( is_archive() && !is_tax() && !is_category() && !is_tag() ) {
              
            echo '
' . post_type_archive_title('', false) . '
';
              
        } else if ( is_archive() && is_tax() && !is_category() && !is_tag() ) {
              
            // For Custom post type
            $post_type = get_post_type();
              
            // Custom post type name and link
            if($post_type != 'post') {
                  
                $post_type_object = get_post_type_object($post_type);
                $post_type_archive = get_post_type_archive_link($post_type);
              
                echo '
' . $post_type_object->labels->name . '
';
                echo '
 ' . $separator . ' 
';
              
            }
              
            $custom_tax_name = get_queried_object()->name;
            echo '
' . $custom_tax_name . '
';
              
        } else if ( is_single() ) {
              
            $post_type = get_post_type();
 
            if($post_type != 'post') {
                  
                $post_type_object = get_post_type_object($post_type);
                $post_type_archive = get_post_type_archive_link($post_type);
              
                echo '
' . $post_type_object->labels->name . '
';
                echo '
 ' . $separator . ' 
';
              
            }
              
            // Get post category
            $category = get_the_category();
             
            if(!empty($category)) {
              
                // Last category post is in
                $last_category = $category[count($category) - 1];
                  
                // Parent any categories and create array
                $get_cat_parents = rtrim(get_category_parents($last_category->term_id, true, ','),',');
                $cat_parents = explode(',',$get_cat_parents);
                  
                // Loop through parent categories and store in variable $cat_display
                $cat_display = '';
                foreach($cat_parents as $parents) {
                    $cat_display .= '
'.$parents.'
';
                    $cat_display .= '
 ' . $separator . ' 
';
                }
             
            }
 
            $taxonomy_exists = taxonomy_exists($tsh_custom_taxonomy);
            if(empty($last_category) && !empty($tsh_custom_taxonomy) && $taxonomy_exists) {
                   
                $taxonomy_terms = get_the_terms( $post->ID, $tsh_custom_taxonomy );
                $cat_id         = $taxonomy_terms[0]->term_id;
                $cat_nicename   = $taxonomy_terms[0]->slug;
                $cat_link       = get_term_link($taxonomy_terms[0]->term_id, $tsh_custom_taxonomy);
                $cat_name       = $taxonomy_terms[0]->name;
               
            }
              
            // If the post is in a category
            if(!empty($last_category)) {
                echo $cat_display;
                echo '
' . get_the_title() . '
';
                  
            // Post is in a custom taxonomy
            } else if(!empty($cat_id)) {
                  
                echo '
' . $cat_name . '
';
                echo '
 ' . $separator . ' 
';
                echo '
' . get_the_title() . '
';
              
            } else {
                  
                echo '
' . get_the_title() . '
';
                  
            }
              
        } else if ( is_category() ) {
               
            // Category page
            echo '
' . single_cat_title('', false) . '
';
               
        } else if ( is_page() ) {
               
            // Standard page
            if( $post->post_parent ){
                   
                // Get parents 
                $anc = get_post_ancestors( $post->ID );
                   
                // Get parents order
                $anc = array_reverse($anc);
                   
                // Parent pages
                if ( !isset( $parents ) ) $parents = null;
                foreach ( $anc as $ancestor ) {
                    $parents .= '
' . get_the_title($ancestor) . '
';
                    $parents .= '
 ' . $separator . ' 
';
                }
                   
                // Render parent pages
                echo $parents;
                   
                // Active page
                echo '
 ' . get_the_title() . '
';
                   
            } else {
                   
                // Just display active page if not parents pages
                echo '
 ' . get_the_title() . '
';
                   
            }
               
        } else if ( is_tag() ) { // Tag page
               
            // Tag information
            $term_id        = get_query_var('tag_id');
            $taxonomy       = 'post_tag';
            $args           = 'include=' . $term_id;
            $terms          = get_terms( $taxonomy, $args );
            $get_term_id    = $terms[0]->term_id;
            $get_term_slug  = $terms[0]->slug;
            $get_term_name  = $terms[0]->name;
               
            // Return tag name
            echo '
' . $get_term_name . '
';
           
        } elseif ( is_day() ) { // Day archive page
               
            // Year link
            echo '
' . get_the_time('Y') . ' Archives
';
            echo '
 ' . $separator . ' 
';
               
            // Month link
            echo '
' . get_the_time('M') . ' Archives
';
            echo '
 ' . $separator . ' 
';
               
            // Day display
            echo '
 ' . get_the_time('jS') . ' ' . get_the_time('M') . ' Archives
';
               
        } else if ( is_month() ) { // Month Archive
               
            // Year link
            echo '
' . get_the_time('Y') . ' Archives
';
            echo '
 ' . $separator . ' 
';
               
            // Month display
            echo '
' . get_the_time('M') . ' Archives
';
               
        } else if ( is_year() ) { // Display year archive
 
            echo '
' . get_the_time('Y') . ' Archives
';
               
        } else if ( is_author() ) { // Author archive
               
            // Get the author information
            global $author;
            $userdata = get_userdata( $author );
               
            // Display author name
            echo '
' . 'Author: ' . $userdata->display_name . '
';
           
        } else if ( get_query_var('paged') ) {
               
            // Paginated archives
            echo '
'.__('Page') . ' ' . get_query_var('paged') . '
';
               
        } else if ( is_search() ) {
           
            // Search results page
            echo '
Search results for: ' . get_search_query() . '
';
           
        } elseif ( is_404() ) {
               
            // 404 page
            echo '
' . 'Error 404' . '
';
        }
 
        echo '
';  
    }
}

将调用代码放到主题模板适当位置比如header.php中：

配套样式：

#tsh_breadcrumbs .separator{
    font-size:20px;
    color:#ccc;
    font-weight:100;
}
#tsh_breadcrumbs{
    overflow:hidden;
    text-align: center;
    list-style:none;
    margin:11px 0;
}
#tsh_breadcrumbs li{
    margin-right:14px;
    display:inline-block;
    vertical-align:middle;
}

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